JP3014965B2 - Punching mold and method for simultaneous processing of stripper plate and die in punching mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching die for punching a workpiece and a method for simultaneously processing a stripper plate and a die in the punching die.

[0002]

2. Description of the Related Art Conventionally, a punching die and a die as a punching die are mounted and used on a punch supporting member and a die supporting member in a punching machine, respectively.
In addition, the punch die includes a vertically movable punch guide mounted on a punch support member and a vertically movable punch body mounted on the punch guide and having a punch tip at a tip. Therefore, a punch support member,
It has a triple structure of a punch guide and a punch body, and each part is provided with a clearance for sliding. Moreover, the punch tip is accurately attached to the punch body.

In addition, the centering of the punch die and the die die is adjusted by an operator each time.

Further, the stripper plate and the die are machined separately.

[0005]

By the way, in the above-mentioned conventional punching die, a punch guide for a punch support member and a punch body having a punch tip for the punch guide at the tip end slide. Since the clearance is provided, the accumulated error and the clearance become large, and a die having a very small die clearance cannot be used.

Further, even if the centering of the punch die and the die die is accurately adjusted each time, since the clearances of the respective parts are present, the processing is performed in a state of misalignment, and burrs are easily generated. There is a problem. Further, since the stripper plate and the die are machined separately, it is very troublesome to adjust the centering of the cutting edge.

An object of the present invention is to make the clearance of a punch guide to a punch support member zero, thereby facilitating the mounting of a punch body to a punch guide and the centering of a punch die and a die die. In particular, it is an object of the present invention to provide a punching die and a method of simultaneously processing the stripper plate and the die in the punching die so as to maintain the concentricity between the stripper plate and the die with high accuracy.

[0008]

SUMMARY OF THE INVENTION In view of the above problems, the invention according to claim 1 is provided with a punch guide which is vertically movable with a clearance of zero with respect to a punch supporting member, and which is provided with a punch guide. An engaging portion formed on the punch tip is engaged with an engaging groove formed on the punch body provided on the guide so as to be vertically movable, and the engaging groove is a T-shaped groove. Things.

According to a second aspect of the present invention, a punch guide is provided on a punch body which is vertically movable with a clearance of zero with respect to a punch support member, and is provided on the punch guide so as to be vertically movable. The engagement portion formed on the punch chip is engaged with the engagement groove, and the clearance between the stripper plate fixed to the punch body and the punch chip is set to a high-precision guide so that the clearance is zero. It is characterized by the following.

According to a third aspect of the present invention, a punch guide is provided so as to be vertically movable with a clearance of zero with respect to a punch support member, and a punch chip is mounted on a punch body which is vertically movable on the punch guide. A plurality of centering holes are vertically formed at positions corresponding to the punch guide, the stripper plate and the die in order to center the stripper plate and the die attached to the lower surface of the punch guide. It is characterized by having.

According to a fourth aspect of the present invention, there is provided a method for simultaneously processing a stripper plate and a die in a punching die, wherein the stripper plate and the die in the punching die are fixed with a jig. After machining the centering holes at the same time, the stripper plate is removed and the cutting edge holes formed in the die are machined to be larger by the clearance.

In the above configuration, the stripper plate and the die are fixed with a jig. In this state, a cutting edge hole and a centering hole are simultaneously formed in the stripper plate and the die.

After that, the stripper plate is removed from the die, and the hole formed in the die is made larger by the clearance. Thus, the concentricity between the punch die and the die die is maintained with high accuracy.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, for example, a turret punch press 1 as a punching machine includes a rotatable punch support member and an upper turret 3 as a die support member.
A lower turret 5 is provided facing each other, and a punch mold 7 and a die mold 9 are mounted on the upper turret 3 and the lower turret 5 facing each other. Die mold 9
The die 11 is mounted in a mounting hole 5H formed in the lower turret 5.

A die chip 11C is integrated on the upper part of the die 11.

A mounting hole 3 formed in the upper turret 3
A punch guide bush 13 is mounted on H. The punch guide bush 13 may be integrated with the upper turret 3. 2, the inner peripheral surface of the punch guide bush 13 has a polygonal cross section, and the outer peripheral surface of the punch guide 15 mounted in the punch guide bush 13 also has a polygonal cross section. .

A plurality of rollers 17 as a rotating body retainer are fitted in the circumference between the punch guide bush 13 and the punch guide 15 at appropriate intervals so as to be rollable in the vertical direction. Therefore, the punch guide 1
5 and the roller 17 are in line contact, and the punch guide 15
The slide surface has zero clearance. It is also possible to use a ball instead of the roller 17.

A punch body 19 is mounted in the punch guide 15 as shown in FIG. The punch body 19 has a T-shaped groove 21 as an engagement groove.
Are formed, and a punch tip 23 is engaged and held in the T-shaped groove 21. That is, the engaging portion 23 of the punch tip 23 is inserted into the T-shaped portion 21T of the T-shaped groove 21.
K is fitted and engaged.

As shown in FIG. 3, when the diameter D ₁ of the punch tip 23, the engagement width H ₁ , the diameter D ₂ of the punch body 19, and the groove width H ₂ , D ₂ −D ₁ = a, H ₂
In -H ₁ = b, a, b it is better to the clearance 0.02～1.02Mm.

A stripper plate 25 is attached to the lower surface of the punch guide 15 with a plurality of bolts 27. A hole 29 through which the tip of the punch tip 23 is moved up and down is formed substantially at the center of the stripper plate 25. The clearance between the hole 29 and the punch tip 23 is used as a highly accurate guide, and the clearance is set to zero.

A retainer 31 is provided above the punch guide 15. A spring seat 33 is provided on the retainer 31, a stripping spring 35 is mounted on the spring seat 33, and a punch head 37 is mounted on the spring seat 33. The punch head 37 is attached to the punch body 19 with bolts 39. ing. The stripping spring 35 may be an elastic member such as urethane rubber other than the spring.

A plurality of through bolts 41 are attached to the upper turret 3, and a holding member 45 for urging the lifter spring 43 upward is attached to each of the through bolts 41, and an upper surface of the holding member 45. Is in contact with the lower surface of the retainer 31. The punch head 3
Above 7, a striker 47 that can move up and down is provided.

With the above structure, when the striker 47 is lowered, the striker 47 comes into contact with the punch head 37, and when the striker 47 is further lowered, the punch guide 15 moves the roller 1 against the punch guide bush 13 while pressing the lifter spring 43.
7 and slides downward together with the stripping spring 35. The stripper plate 25 is the die 11
When the striker 47 further descends, it comes into contact with the workpiece W placed thereon and stops.
5 is bent and the punch tip 23 is stripper plate 25
Punches out the work W from the hole 29
Go inside one.

At this time, since the slide portions of the punch guide 15 and the punch guide bush 13 are in a state where a preload (preload) is applied to the roller 17, the clearance becomes zero, and the clearance between the punch chip 23 and the die 11 is reduced. Can be. At this time, the punch tip 23 and the T-shaped groove 21 formed in the punch body 19 are engaged with the punch body 19 so that they can be easily assembled and exchanged easily and easily. Since the punch body 19 is roughly mounted on the punch guide 15, it can be easily mounted. Also,
By using a highly accurate guide for the clearance between the hole 29 and the punch chip 23, the accumulated error can be suppressed as much as possible.

When centering the die 11 with the stripper plate 25 attached to the lower surface of the punch guide 15, as shown in FIG.
5, a plurality of centering holes 49, 51, 53 as centering devices are formed in the corresponding positions of the stripper plate 25 and the die 11 in the vertical direction.

With the above configuration, first, for example, the centering pins 55 are mounted in the centering holes 49 and 51 formed in the punch guide 15 and the stripper plate 25, for example. Then, the centering pin 55 is mounted in alignment with the centering hole 53 formed in the die 11. In this state, the die 11 is fixed with the lower turret 5 with the set screw 57, for example.

Thereafter, the centering pin 55 is removed from the centering hole 53 formed in the die 11, and in this state, the stripper plate 25 is connected to the punch guide 13 with a plurality of bolts as shown in FIG. 27, and the centering pin 55 is pulled out from the centering holes 49 and 51 formed in the punch guide 13 and the stripper plate 25.
The centering of the stripper plate 25 and the die 11 can be performed easily and easily.

Next, a method for simultaneously processing the stripper plate 25 and the die 11 in the punching die will be described. As shown in FIGS. 5A and 5B, for example, a die chip 11C is placed on a jig 59. And the stripper plate 25 are placed one on top of the other and fixed with bolts 61. Next, the stripper plate 25 is cut by, for example, wire cutting.
Hole 29 and the cutting edge hole 11H of the die tip 11C corresponding to this hole 29 are simultaneously machined, and the centering holes 51,
53 are processed simultaneously.

Then, after taking out only the stripper plate 25, as shown in FIG.
A large hole is machined in the blade tip hole 11H of the C by the clearance C.

Therefore, the centering of the stripper plate 25 and the die 11 can be easily performed by using the centering holes 51 and 53 which are simultaneously processed.
The concentricity between the punch die 7 and the die die 9 can be maintained with high accuracy.

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes.

[0033]

As will be understood from the above embodiment, according to the first aspect of the present invention, the punch guide is provided so as to be vertically movable with the clearance being zero with respect to the punch supporting member. As a result, the engaging portion formed on the punch chip can be easily engaged with the engaging groove formed on the punch body, and the punch body can be roughly mounted on the punch guide. Therefore, mounting can be easily performed. In addition, the punch chip can be centered and positioned on a stripper plate provided at the tip of the punch guide.

Further, since the engaging groove is a T-shaped groove, the engaging portion of the punch chip can be more easily engaged with the T-shaped groove.

According to the second aspect of the present invention, the clearance between the stripper plate and the punch chip is set as a high-precision guide and the clearance is set to zero, so that
Since the punch chip can be moved up and down with the clearance being zero with respect to the stripper plate, the accumulated error can be minimized.

According to the third aspect of the present invention, the die is mounted with the centering pins mounted in the centering holes formed at the corresponding positions of the punch guide, the stripper plate and the die of the punching die. After fixing and then removing the centering pin from the die, the stripper plate is fixed to the punch guide. Then, the centering of the punch die and the die die can be easily performed by removing the centering pins.

According to the fourth aspect of the present invention, the stripper plate and the die are fixed by the jig.

In this state, the cutting edge hole and the centering hole are simultaneously formed in the stripper plate and the die. afterwards,
The stripper plate is removed from the die, and the hole formed in the die is made larger by the clearance.
Thus, the concentricity between the punch mold and the die mold can be maintained with high accuracy.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a punching die mounted on a turret punch press according to an embodiment of the present invention.

FIG. 2 is an arrow view along the line II-II in FIG.

FIG. 3 is a perspective view of assembling a punch chip on a punch body.

FIG. 4 is an explanatory diagram for centering a stripper plate and a die in a punching die.

5A is a front view for explaining simultaneous processing of a stripper plate and a die chip, and FIG. 5B is a plan view of FIG.

FIG. 6 is an explanatory diagram of an operation for simultaneously processing a stripper plate and a die chip.

[Explanation of symbols]

 Reference Signs List 1 turret punch press (punching machine) 3 upper turret (punch support member) 5 lower turret (die support member) 7 punch die 9 die die 11 die 11C die chip 13 punch guide bush 15 punch guide 17 roller 19 punch body 21 T Figure-shaped groove 23 Punch tip 25 Stripper plate 49,51,53 Centering hole (Centering device) 55 Centering pin 57 Set screw

Claims (4)

(57) [Claims] A punch guide is provided for a punch support member so as to be vertically movable with a clearance of zero, and a punch chip is provided in an engagement groove formed in a punch body provided in the punch guide so as to be vertically movable. Wherein the engaging groove is a T-shaped groove. 2. A punch guide is provided in a punch body with a clearance of zero with respect to a punch support member so as to be vertically movable, and a punch chip is formed in an engagement groove formed in a punch body provided in the punch guide so as to be vertically movable. A punching metal, wherein a clearance between the stripper plate fixed to the punch body and the punch chip and the punch tip is made a high-precision guide and the clearance is zero. Type. 3. A punch body which is vertically movable with a clearance of zero with respect to a punch support member, and wherein a punch tip is provided on a punch body which is vertically movable on the punch guide. In order to center the stripper plate and the die attached to the lower surface of the guide, a plurality of centering holes are formed in the vertical direction at positions corresponding to the punch guide, the stripper plate and the die, respectively. Punching mold. 4. After the stripper plate and the die in the punching die are fixed with a jig and the stripper plate and the die are simultaneously machined with the cutting edge hole and the centering hole,
A method for simultaneously processing a stripper plate and a die in a punching die, wherein a stripper plate is removed and a blade hole formed in the die is processed to be larger by an amount corresponding to a clearance.